TFNC London Sonia Maxi Dress Nude Blush XS NWT Plunge Backless Formal Wedding Guest. Elegant and romantic TFNC London Sonia maxi dress in a soft nude blush tone. This stunning floor-length gown features a deep plunge neckline, pleated bodice, empire waist, and flowing chiffon skirt that creates a flattering, feminine silhouette.